Ventilator



A. PFAU.

VENTILATOR. APPLICATION FILED JUNE 12,1916.

mmedse t. 1921.

2 SHEETS-SHEET I.

A. PFAU.

VENTJLATOH. APPLICATION FILED JUNE 12, 1916.

2 SHEETS-SHEET 2.

' ED STA ABNOLD PFAU, OF MILWAUKEE, WISCONSIN.

vmrrrta'roal To all'wlzomtt concern:-

Be itknown that ARNOLD PFAU, a citizen of the Republicof Switzerland, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, has invented a certain new and useful Improvement in Ventilators, of which the following is a specification.

This invention relates to improvements in the construction andoperation of ventilators or deodorizers for water closets and similar devices- An object of the invention is to provide a ventilator which is simple in construction and eflicient in operation. One of the more specific objects is to provide a ventilator for water closets, which may be readily operated at the will of a person utilizing the closet.

.Another specific-object is-to provide a gas ejector especially applicable to water closet ventilators, which is sim le in construction,

highly efiicient in operation and which may I be manufactured at minimum cost.

erated ventilator applied theret f mati'cally Still another specific object is to provide various improvements in the details of water closet section, of a water closet having a foot op- Fig. 2, is an enlarged central verticalsection through a gas ejector showing the details of construction thereof.

Fig. 3, is a side elevation partly in section, of a water closet having an autoseat operated ventilator applied thereto. f. p Fig; 4, is an enlarged central vertical 1 section through an improved form of trap showing the details of construction thereof.

' flush tank 3 connected with the bowl 2by 1 he ordinary type -of water closet to which the invention may be applied, comprlses essentially a water closet bowl 2, a

. means-of a'flush pipe 4, a water supply pipe '6'. communicating with the interior of the flush tank 3, a vent pipe 5 communicating with the sewer and. with theexternal atmoson of Letters Patent.

Figure 1," is a side' elevation partly in Patented Sept. 6, 1921.

; Application filed me 12, 1916. Serial No. 103,052.

phere, and a main discharge pipe '7 connecting the bowl 2 with the vent pipe 5. The bowl 2 is usually provided with a hinged seat 15 and a cover 14, swinging upon a pivot 32, and has a base portion which rests directly upon the floor 43 of the toilet. The fiush tank 3 is provided with the usual float controlled inlet valve, overflow pipe and flushing mechanism, not shown.

Referring specifically to Fig. 1, the foot operated ventilator comprises essentially a gas ejector 1, a conduit or pipe 9 connecting theejector 1 with the interior of the bowl 2, awater supply pipe 11 communicating with the main watersupply 6 through a valve 20 and a branch pipe 10, and a gas discharge pipe 12 communicating with the vent pipe 5 through the trap 8 and pipe 13. The gas ejector 1 andtrap 8 are preferably located within a suitable casing 16 provided with a cover 17 for permitting ready access to these elements. J The controlling valve 20 is located below and in front of the bowl 2, and is readily operable by the foot of a person utilizing the bowl 2, to open the valve, by means of a treadle 18 which projects slightly above-the floor 43. The valve 20 is normally maintained in closed position by means of a helical compression spring 19.

Referring specifically to Fig. 3, the ventilator which in this disclosure is automatically seat operated, comprises essentially a gas ejector 1,'a conduit or pipe 9 connecting the ejector 1 with the interior of the closet bowl 2, a water supply pipe 11' connected with the ,main water supply 6 through a valve 35 and branch pipe 10, and a gas dis charge pipe 12 communicating with the vent pipe 5 through a trap 8 and pipe 13: The

valve 35 is normally closed by means of a helical compression spring 33 engaging a collar 34 carried by the valve stem 36. A

lever 30 is mounted intermediate its ends upon the pivot 32, one end of the lever being adapted for engagement with the underside of the collar 34, and the other end of the lever being formed as a finger 31adapted for engagement with the lower surface of the seat 15.- The spring 33 besides normally "retaining the valve35 in closed dposition, also normally retains the seat 15 an cover 14 m the position disclosed in the figure. The gas ejector, 1, trap 8 and valve 35 are preferablylocated within a suitable casing 16 provided with a cover 17 for permitting ready access to these elements. The cover 17 at the point of penetration of the lever 30 therethrough, is provided with an elongated slot for permitting Vertical movement oftherethrough, is mounted within the T fitting 21, in such a manner that an annular chamber 25 surrounding the element 22 is formed. The through passage 23 has a local constriction 24 and is provided with one or more openings 26 connecting the chamber 25 with the passage 23. The openings26 are located beyond the constriction 24 and remote from the water supply pipe 11 which communicates with the upper end of the element 22. The lower end of the element 22 is connected directly to the gas discharge pipe 12. Theelement 22 is provided with an abutment or clamping surface 27 which is clamped against a washer 29 at one end of the T fitting 21 by means of a clamping nut 28 engaging screw threads at the upper end of the element 22. The nut 28 preferably engages awasher'29 which engages the upper end of the T fitting 21, the washers 29 preferably being formed of aluminum or other relatively soft metal.

Referring specifically to Fig. 4, the trap 8 comprises essentially a casing forming a chamber, a downwardly extending conduit 39 projecting into and terminating in the lower portion of the chamber, and an upwardly extending conduit 40 projecting into and terminating in the upper portion of thechamber. The conduit 39 is formed in the upper trap element 37 and is connected directly with the ejector discharge pipe 12 by means of a coupling 41, while the conduit 40 is formed in the lower trap element 38 and is connected directly with the branch pipe 13 by means of a coupling 41. The elements 37, 38 are exactly alike in structure and differ only intheir location. These elements may be joined by any suitable means such as bolts. .The interior of the trap is partly filled with water, the depth .of which is determined by the upper extremity of the conduit 40, and which forms a liquid seal for the lower extremity of the conduit 39.

The operation of the foot actuated device disclosed in Fig. 1 is as follows: The valve 20 is normally in closed position, the treadle 18 being in its uppermost position projecting slightly above the floor 43, and the 20 and pipe 11 to the ejector 1. The water entering the ejector 1 flows through the passage 23 of the element 22 and has its pressure converted into velocity by virtue of the constriction 24 in the passage 23. The water flowing at high velocity creates a negative pressure in the passage 23 beyond the constriction 24 and induces a flow of gas from the interior of the water closet bowl 2 through the conduit or pipe 9, chamber 25 and openings 26. The gas thus drawn into the lower extremity of the passage 23 mixes with the water and is carried into the tra 8 through the pipe 12 and conduit 9.

The mixture of water and gas is dischargedinto the pipe 13 through the conduit 40 and is eventually delivered into the vent pipe 5 where some of the gases are liberated from the mixture andfiow to the external atmosphere .while the remaining mixture flows to the sewer. This eduction of gases continues as lOIlg as the valve 20 is maintained open, or until the footis removed from the treadle 18. Upon closing the valve 20, the flow of water through the ejector 1 ceases and causes the flow of gas from the bowl 2 to cease. The water last passing through the ejector 1 accumulates in the trap 8 as indicated in Fig. 4, and forms a seal for the lower end of the conduit 39 preventinggases from flowing from the I p1pe 13 into the pipe 12.

. he operation of the automatically seat operated ventilator disclosedin Fig. 3, is essentially the same as that of the foot operated device, except that operation is effected by pressing down the seat 15. Downward movement of the seat 15 moves the finger 31 down and swings the lever 30 above the pivot 32. This swinging'of the lever 30 moves the collar 34 and stem 36 upwardly against the action of the spring 33 and opens the valve 35. Opening of the valve 35 permits water to flow through the passage 23 and causes an induced flow of as from the bowl 2, as above described. peration of the ventilator ceases upon release of the seat 15 upon happening of which event the spring 33 and the water ressure acting upon the valve 35, automatically close the valve 35 and restore the lever 30 and seat 15 to the position disclosed in Fig. 3. The seat Y operated type of ventilator is objectionable due to the fact that the device is operatingfoot operated type would probably be more ventilator being ineffective. If it is desired 'desirable in privateresidences as it econoto operate the ventilator, it isnecessary only to place the foot upon the treadle 18 thereby opening the valve 20 and permitting water to pass from the pipe 10 through'the valve mizes in the use of water when operation of the ventilator is not necessary, and may be readily actuated at will without 1136 88511) occupation of the seat.

- is produced. The efficiency of this ejector is not dependent upon the nature of the operation of the ventilator, the device maintaining its high efiiciency regardless of whether the operation is manually or automatically efiected.

The trap 8 disclosed in detail in Fig. l is simple in construction and when used in connection with an ejector 1, augments the efficiency of such ejector since it produces minimum obstruction to the flow of the mixture delivered from the ejector. The trap forms an efficient seal for preventing back flow of gases. A single pattern may be utilized to cast the elements 37 38 and as these elements are interchangeable, only one form need be carried in stock.

While the conduit 9 has been disclosed as communicating with the bowl 2 through the flush pipe 4, this conduit 9 may communicate directly with t'he bowl' 2. The ventilators may be applied to any existing water closet systems andneed not be placed in a casing 16, although such concealment would be desirable in new installations. The cover 17 per mits ready access to the various elements for inspection and repairs.

It should be understood that it is not desired to be limited to the exact details of construction herein shown and described for obvious modifications may occur to. a person skilled in the art.

It is claimed and desired to secure by Lett'ers Patent 1. In combination, a water closet bowl, conduit means havin a constriction formed by gradually converglng and diverging communicating portions, a water supply communicating with said gradually converging conduit portion, and gas conduit means connecting said bowl with said gradually diverging conduit portion beyond said constriction.

2. In combination, a water closet bowl, conduit means having a constriction formed by gradually converging and diverging communicating portions, a Water supply communicating with said gradually converging conduit portion, and means forming a gas conduit connecting said bowl with said gradually diverging conduit portion beyond said constriction, said gas conduit being directed inwardly toward said diverging portion and in the direction of flow of water therethrough.

3. In combination, a water closet bowl, conduit means having a local constriction formed by gradually converging and diverging communicating portions, a controllable water supply communicating with the larger end of said gradually converging conduit portion, and means forming a gas conduit connecting said bowl with said gradually diverging conduit portion beyond said constriction, said gas conduit being directed inwardly toward said diverging portion and in the direction of flow of water therethrough.

In testimony whereof the signature of the inventor is afiixed hereto.

'ARNOLD- PFAU. 

